login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A280883 Number of set partitions of [n] into exactly five blocks where sizes of distinct blocks are coprime. 1
1, 15, 35, 630, 126, 6930, 9570, 202455, 35035, 3612609, 361725, 25350780, 50620220, 1262865060, 15864468, 33652405845, 942571665, 68217941715, 72924794635, 7281932609490, 364040548850, 111203641740750, 79780936522950, 2097251547484275, 471615091340211 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Table of n, a(n) for n=5..29.

Wikipedia, Coprime integers

Wikipedia, Partition of a set

CROSSREFS

Column k=5 of A280880.

Sequence in context: A074891 A328213 A271733 * A306325 A241282 A249056

Adjacent sequences:  A280880 A280881 A280882 * A280884 A280885 A280886

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jan 09 2017

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 27 04:10 EDT 2021. Contains 347673 sequences. (Running on oeis4.)